Light shading structure, and color filter substrate, active device array substrate, liquid crystal display panel thereof

ABSTRACT

A color filter substrate including a substrate, a light shading structure, and a plurality of color filter units is provided. The substrate has a display region and a non-display region. The light shading structure disposed on the substrate includes a black matrix layer and a light shading layer, wherein the black matrix layer is disposed on the substrate and defines a plurality of sub-pixel regions in the display region, and covers the non-display region adjacent to the edge of the display region; the light shading layer is disposed on the black matrix layer of the non-display region adjacent to the edge of the display region and has at least one channel. The color filter units are correspondingly disposed in the sub-pixel regions.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a divisional application of and claims prioritybenefit of an application Ser. No. 11/309,001, filed on Jun. 7, 2006,now allowed. The entirety of the above-mentioned patent application ishereby incorporated by reference herein and made a part of thisspecification.

BACKGROUND OF THE INVENTION

1. Field of Invention

The invention relates to a light shading structure, a filter substrate,an array substrate, and a display panel, and more particularly, to alight shading structure used to solve the problem of light leakage andhaving a function of liquid crystal flow guidance, and a color filtersubstrate, an active device array substrate, and an LCD panel having thelight shading structure.

2. Description of Related Art

With the development of photoelectric techniques and semiconductormanufacturing techniques, the flat panel display with the advantages ofbeing thin and light has gradually matured. Among flat panel displays,such as Liquid Crystal Displays (LCDs), Organic Electro-LuminescenceDisplays (OELDs), and Plasma Display Panels (PDPs), the LCD withadvantages of high definition, high space utilization efficiency, lowpower consumption, and non-radiation has gradually become the marketmainstream.

Generally, an LCD is composed of an LCD panel and a backlight module,wherein the LCD panel includes an active device array substrate, a colorfilter substrate, and a liquid crystal layer sandwiched there-between.And full color effects can be achieved by the color filter substrate.

FIG. 1 is a schematic view of a conventional color filter substrate.Referring to FIG. 1, the color filter substrate 100 mainly includes asubstrate 102, black matrixes 104 a, 104 b, a plurality of color filterunits 106, and a common electrode 108. The substrate 102 can be dividedinto a display region 102 a and a non-display region 102 b surroundingthe periphery of the display region 102 a. The black matrixes 104 a, 104b are disposed on the substrate 102, wherein the black matrix 104 adefines a plurality of sub-pixel regions 110 in the display region 102a; the black matrix 104 b covers the non-display region 102 b adjacentto the edge of the display region 102 a. The color filter units 106 arerespectively formed by a plurality of photoresists with different colors(e.g., red photoresist, green photoresist, and blue photoresist, etc.)through exposure, development, and other processes, and arecorrespondingly disposed in the sub-pixel regions 110 defined by theblack matrixes 104. Moreover, a common electrode 108 is disposed on thesurface of the black matrixes 104 a, 104 b, and the color filter units106.

Referring to FIG. 1 again, the main function of the black matrix 104 aof the display region 102 a is to separate emergent lights withdifferent colors, so as to increase the color contrast and the colorpurity when displaying. Moreover, the black matrix 104 b covering thenon-display region 102 b adjacent to the edge of the display region 102a is used to avoid light leakage through the non-display region 102 b.

In the early days, black matrixes 104 a, 104 b were usually made ofChromium (Cr), such that the black matrixes 104 a, 104 b made of Cr havepreferred light shading effects. However, since Cr causes environmentalpollution, it has gradually been forbidden for use. Consideringenvironmental protection, using green materials has currently become themain trend. Therefore, in the current processes, resin is used toreplace Cr in most cases.

However, using resin will cause another problem. Since the light shadingeffect of resin is weaker than that of Cr, part of the light will stillpenetrate through the black matrix 104 b of the non-display region 102 band leak to the outside, so as to result in light leakage at thenon-display region 102 b adjacent to the display region 102 a.Particularly with the development of LCD panels of high brightness andlarge size, the above light leakage phenomenon will be more severe inLCD devices with a high-brightness backlight module.

Further, when the above color filter substrate 100 is used formanufacturing an LCD panel (not shown), the liquid crystal (not shown)is disposed on the color filter substrate 100, and then, a sealant (notshown) is used to adhere the color filter substrate 100 and the activedevice array substrate (not shown) together. The liquid crystal may flowto the location of the sealant, and if the liquid crystal is in contactwith the un-solidified sealant, it will be contaminated and the qualityof the LCD panel will be deteriorated.

SUMMARY OF THE INVENTION

In view of the above, the invention provides a light shading structure,which can solve the light leakage problem of the liquid crystal display(LCD) panel at the edge of the display region, preventing the liquidcrystal from being contaminated by the sealant.

The invention also provides a color filter substrate, which can solvethe light leakage problem of the LCD panel with a color filtersubstrate.

The invention further provides an active device array substrate, whichcan solve the light leakage problem of the LCD panel with an activedevice array substrate.

The invention additionally provides an LCD panel, which can solve thelight leakage problem at the edge of the display region and prevent theliquid crystal from being contaminated by the sealant.

Accordingly, a light shading structure suitable for being disposed on asubstrate is provided, which has a display and a non-display region. Thelight shading structure includes a black matrix layer and a lightshading layer. The black matrix layer is disposed on the substrate anddefines a plurality of sub-pixel regions in the display region. Theblack matrix layer also covers the non-display region adjacent to theedge of the display region. The light shading layer is disposed on theblack matrix layer of the non-display region adjacent to the edge of thedisplay region and has at least one channel.

As for the light shading structure in an embodiment of the invention,the material of the light shading structure is selected from the groupconsisting of red photoresist, green photoresist, blue photoresist and acombination thereof.

As for the light shading structure in an embodiment of the invention,the material of the black matrix layer includes resin.

As for the light shading structure in an embodiment of the invention,the light shading layer includes a first light shading layer, a secondlight shading layer, and a third light shading layer, wherein the secondlight shading layer is disposed on the first light shading layer; thethird light shading layer is disposed on the second light shading layer.

The invention further provides a color filter substrate, which includesa substrate, a light shading structure, and a plurality of color filterunits. The substrate has a display region and a non-display region. Thelight shading structure disposed on the substrate includes a blackmatrix layer and a light shading layer, wherein the black matrix layeris disposed on the substrate and defines a plurality of sub-pixelregions in the display region, and covers the non-display regionadjacent to the edge of the display region; the light shading layer isdisposed on the black matrix layer of the non-display region adjacent tothe edge of the display region and has at least one channel. The colorfilter units are correspondingly disposed in the sub-pixel regions.

As for the color filter substrate in an embodiment of the invention, thelight shading layer has at least one channel disposed in the lightshading layer.

As for the color filter substrate in an embodiment of the invention, thematerial of the light shading layer is selected from the groupconsisting of red photoresist, green photoresist, blue photoresist and acombination thereof.

As for the color filter substrate in an embodiment of the invention, thematerial of the black matrix layer includes resin.

As for the color filter substrate in an embodiment of the invention, thelight shading layer includes a first light shading layer, a second lightshading layer, and a third light shading layer, wherein the second lightshading layer is disposed on the first light shading layer; the thirdlight shading layer is disposed on the second light shading layer.

As for the color filter substrate in an embodiment of the invention, acommon electrode is further included to be disposed on parts of thelight shading structure and the color filter units.

The invention further provides an active device array substrate, whichincludes a substrate, a plurality of scan lines, a plurality of datalines, a plurality of active devices, a plurality of pixel electrodes, alight shading structure, and a plurality of color filter units. Thesubstrate has a display region and a non-display region. The scan linesand the data lines are disposed in the display region. The activedevices are disposed in the display region on the substrate, and eachactive device is electrically connected with the above scan lines andthe data lines. The pixel electrodes are disposed in the display regionon the substrate, and each pixel electrode is respectively electricallyconnected with one of the above active devices. The light shadingstructure is disposed on the substrate and includes a black matrix layerand a light shading layer, wherein the black matrix layer is disposed onthe substrate and defines a plurality of sub-pixel regions in thedisplay region, and covers the non-display region adjacent to the edgeof the display region; the light shading layer is disposed on the blackmatrix layer of the non-display region adjacent to the edge of thedisplay region and has at least one channel. The color filter units arecorrespondingly disposed in the sub-pixel regions.

As for the active device array substrate in an embodiment of theinvention, the light shading layer further includes at least one channeldisposed in the light shading layer.

As for the active device array substrate in an embodiment of theinvention, the material of the light shading layer is selected from thegroup consisting of red photoresist, green photoresist, blue photoresistand a combination thereof.

As for the active device array substrate in an embodiment of theinvention, the material of the black matrix layer includes resin.

As for the active device array substrate in an embodiment of theinvention, the light shading layer includes a first light shading layer,a second light shading layer, and a third light shading layer, whereinthe second light shading layer is disposed on the first light shadinglayer; the third light shading layer is disposed on the second lightshading layer.

The invention further provides an LCD panel, which includes a colorfilter substrate mentioned above, an active device array substrate, anda liquid crystal layer, wherein the liquid crystal layer is sandwichedbetween the color filter substrate and the active device arraysubstrate.

As for the LCD panel in an embodiment of the invention, a sealant isfurther included, which is located between the color filter substrateand the active device array substrate, and surrounds the light shadingstructure. Moreover, the light shading layer has at least one channeldisposed in the light shading layer.

The invention further provides an LCD panel, which includes an activedevice array substrate mentioned above, an opposite substrate, and aliquid crystal layer, wherein the liquid crystal layer is sandwichedbetween the active device array substrate and the opposite substrate.

As for the LCD panel in an embodiment of the invention, a sealant isfurther included, which is located between the active device arraysubstrate and the opposite substrate, and surrounds the light shadingstructure. Moreover, the light shading layer has at least one channeldisposed in the light shading layer.

In the light shading structure provided by the invention, the lightshading layer is disposed on the black matrix layer of the non-displayregion adjacent to the edge of the display region, so as to improve thelight shading effect of the non-display region. The light shadingstructure can be applied to the color filter substrate or the activedevice array substrate with a color filter array layer on the arraysubstrate (Color filter on Array, COA). The LCD panel manufactured withthe color filter substrate or the active device array substrate in theform of COA will alleviate the light leakage at the edge of the displayregion. Moreover, the light shading layer has at least one channel, suchthat during the manufacturing processes of the LCD panel, the flow speedof the liquid crystal will be slowed down by the channel, so as to avoidthe contamination caused by the contact of liquid crystal andun-solidified sealant.

In order to make aforementioned and other features and advantages of theinvention comprehensible, an embodiment accompanied with figures aredescribed in detail below.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary, and are intended toprovide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are included to provide a furtherunderstanding of the invention, and are incorporated in and constitute apart of this specification. The drawings illustrate embodiments of theinvention and, together with the description, serve to explain theprinciples of the invention.

FIG. 1 is a schematic view of a conventional color filter substrate.

FIG. 2 is a schematic cross-sectional view of a light shading structureaccording to an embodiment of the invention.

FIGS. 2A-2C are schematic top views of the channel for the light shadingstructure of FIG. 2.

FIG. 3 is a schematic top view of a light shading structure according toanother embodiment of the invention.

FIG. 3A is a schematic cross-sectional view of FIG. 3 along the line ofA-A′.

FIG. 4 is a schematic cross-sectional view of a light shading structureaccording to another embodiment of the invention.

FIG. 5 is a schematic cross-sectional view of a color filter substrateaccording to an embodiment of the invention.

FIG. 6 is a schematic cross-sectional view of an LCD panel according toan embodiment of the invention.

FIG. 7 is a schematic cross-sectional view of an active device arraysubstrate according to an embodiment of the invention.

FIG. 8 is a schematic cross-sectional view of an LCD panel according toanother embodiment of the invention.

DESCRIPTION OF EMBODIMENTS

FIG. 2 is a schematic cross-sectional view of a light shading structureaccording to an embodiment of the invention. FIGS. 2A-2C are schematictop views of the channels of the light shading structure of FIG. 2.Referring to FIG. 2 and FIGS. 2A-2C, a light shading structure 200 isdisposed on a substrate 300. The substrate 300 has a display region 300a and a non-display region 300 b. The light shading structure 200includes a black matrix layer 210 and a light shading layer 220, whereinthe black matrix layer 210 is disposed on the substrate 300 and definesa plurality of sub-pixel regions 210 a in the display region 300 a, andcovers the non-display region 300 b adjacent to the edge of the displayregion 300 a; the light shading layer 220 is disposed on the blackmatrix layer 210 of the non-display region 300 b adjacent to the edge ofthe display region 300 a, and the light shading layer 220 has at leastone channel 222.

Referring to FIG. 2 again, in an embodiment, the material of thesubstrate 300 is, for example, glass, quartz, or flexible material.Moreover, the material of the black matrix layer 210 is, for example,resin or another suitable material, which meets the requirements ofenvironmental protection. It should be noted that the light shadinglayer 220 is disposed on the black matrix layer 210 of the non-displayregion 300 b adjacent to the edge of the display region 300 a, so as toenhance the light shading effect of the non-display region 300 a, thatis, the optical density of the black matrix layer 210 with the lightshading layer 220 disposed in the non-display region 300 b can be largerthan 4.8. Moreover, in an embodiment, the material of the light shadinglayer 220 is, for example, selected from the group consisting of redphotoresist, green photoresist, blue photoresist and a combinationthereof.

Particularly, the light shading layer 220 of the light shading structure200 has a channel 222 with a pattern as shown in FIGS. 2A-2C. Thepattern of the channel 222 is not restricted in the invention. Thefunction of the channel 222 is described below. During the process formanufacturing the LCD panel, since the flow guiding effects of thechannel 222 can slow down the flow speed of the liquid crystal, thecontamination caused by the contact of liquid crystal and un-solidifiedsealant (not shown) can be avoided.

In the above light shading structure 200, the light shading layer 220 isa single-layer film. However, the light shading layer 220 is not limitedto be a single-layer film. In the following embodiments, the lightshading layer can be a multi-layer film with two or more than threelayers. Not only can the light shading effect be preferably improved,but during the process for manufacturing the LCD panel, the flow speedof the liquid crystal also can be slowed down effectively.

FIG. 3 is a top schematic view of a light shading structure of anotherembodiment of the invention. FIG. 3A is a schematic cross-sectional viewof FIG. 3 along the line of A-A′. Referring to FIG. 3 and FIG. 3A, thelight shading structure 200 a is similar to the above light shadingstructure 200 with the difference lying in that the light shading layer200 a in FIG. 3 includes a first light shading layer 200 a 1 and asecond light shading layer 200 a 2. It should be noted that there are aplurality of channels 222 in the light shading structure 200 a.Therefore, the light shading structure 200 a with more than two lightshading layers 200 a 1, 220 a 2 can be used to improve the light shadingeffect, and during the process for manufacturing the LCD panel, the flowspeed of the liquid crystal can be slowed down by utilizing the flowguiding effect of the channel 222 and the slope, as shown in FIG. 3A,formed by stacking a plurality of light shading layers. Therefore, ittakes the liquid crystal a longer time to flow to the sealant (notshown), and the liquid crystal can be prevented from being contaminatedby the un-solidified sealant.

FIG. 4 is a schematic cross-sectional view of a light shading structureaccording to another embodiment of the invention. Referring to FIG. 4,the light shading structure 200 b, similar to the above light shadingstructures 200, 200 a, has the channel 222 as shown in FIGS. 2A-2C, andFIG. 3, with the difference lying in that the light shading layer 220 bas shown in FIG. 4 includes a first light shading layer 220 b 1, asecond light shading layer 220 b 2, and a third light shading layer 220b 3. The second light shading layer 220 b 2 is disposed on the firstlight shading layer 220 b 1. The third light shading layer 220 b 3 isdisposed on the second light shading layer 220 b 2. Thereby, the lightshading effect of the light shading structure 200 b can be preferablyimproved, and the flow speed of the liquid crystal can be slowed down.

In view of the above, in this embodiment, the material of the firstlight shading layer 220 b 1 is, for example, red photoresist; thematerial of the second light shading layer 220 b 2 is, for example,green photoresist; and the material of the third light shading layer 220b 3 is, for example, blue photoresist. Since the first light shadinglayer 220 b 1, the second light shading layer 220 b 2, and the thirdlight shading layer 220 b 3 respectively employ three photoresists withdifferent colors, no matter what the color of the light leaking from theblack matrix layer 210 at the edge of the display region 300 a, thelight can be shaded by the light shading layer 220 b. Of course, thematerials of the first light shading layer 220 b 1, the second lightshading layer 220 b 2, and the third light shading layer 220 b 3 can beselected from red photoresist, green photoresist, or blue photoresist asdesired. It is not limited that the first light shading layer 220 b 1must be a red photoresist, the second light shading layer 220 b 2 mustbe a green photoresist, and the third light shading layer 220 b 3 mustbe a blue photoresist.

It should be noted that the light shading structures 200, 200 a, 200 bcan be applied in the components of the LCD panel, for example, colorfilter substrate or active device array substrate in the form of COA.The light shading structures 200, 200 a, 200 b can be used to avoid thelight leakage at the edge of the display region of the LCD panel, andprevent the contamination caused by the contact of liquid crystal andun-solidified sealant. The structures and advantages of a color filtersubstrate, an active device array substrate, and an LCD panel having thelight shading structure 200 b will be described below, taking the lightshading structure 200 b as an example.

FIG. 5 is a schematic cross-sectional view of a color filter substrateof an embodiment of the invention. Referring to FIG. 5, a color filtersubstrate 400 includes a substrate 300, a light shading structure 200 b,and a plurality of color filter units 410, wherein the light shadingstructure 200 b is just the light shading structure 200 b shown in FIG.4, and can also be the light shading structures 200, 200 a shown in FIG.2 and FIG. 3A, thus, the detailed structure will not be described againherein. The color filter units 410 are correspondingly disposed in thesub-pixel regions 210 a.

It should be noted that as for the color filter substrate 400, the lightshading layer 220 b is disposed on the black matrix 210 in thenon-display region 300 b, such that the light shading effect of thecolor filter substrate 400 at the non-display region 300 b can beimproved.

Further, in an embodiment, the light shading structure 200 b of thecolor filter substrate 400 can include at least one channel 222 disposedin the light shading layer 220 b. The pattern of the channel 222 can bethe one shown in FIGS. 2A-2C, and FIG. 3, and other patterns also can beused as desired.

The materials of the substrate 300, the black matrix 210, and the lightshading layer 220 b of the invention are the same as that mentionedabove, which will not be described again herein. It should be noted thatthe color filter unit 410 includes, for example, a red filter unit 412,a green filter unit 414, and a blue filter unit 416, with the materialsbeing respectively red photoresist, green photoresist, and bluephotoresist, which are the same as that of the light shading layer 220b. That is to say, the light shading layer 220 b as shown in FIG. 5 ismanufactured through the process for manufacturing the color filter unit410 also.

More specifically, when the red filter unit 412, the green filter unit414, and the blue filter unit 416 are formed respectively, the firstlight shading layer 220 b 1, the second light shading layer 220 b 2, andthe third light shading layer 220 b 3 are meanwhile stacked in sequenceon the black matrix 210 in the non-display region 300 b, so as to formthe light shading layer 220 b. Therefore, additional processing devicesor masks are not required for manufacturing the light shading layer 220b, so the manufacturing cost will not increase. Moreover, the combiningsequence of the first light shading layer 220 b 1, the second lightshading layer 220 b 2, and the third light shading layer 220 b 3 can bevaried depending on the forming sequence of the color filter unit 410 orthe design of the mask, and it is not limited that the light shadinglayers must be formed at the same time with the color filter unit 410.

Referring to FIG. 5, the color filter substrate 400 further includes acommon electrode 420 disposed on parts of the light shading structure200 b and the color filter unit 410. In an embodiment, the material ofthe common electrode 420 can be indium tin oxide (ITO), indium zincoxide (IZO), or another transparent conducting material. Through usingthe color filter substrate 400 as shown in FIG. 5, the LCD panel 500that will be described below can be manufactured.

FIG. 6 is a schematic cross-sectional view of an LCD panel according toan embodiment of the invention. Referring to FIG. 6, the LCD panel 500includes the color filter substrate 400, an active device arraysubstrate 510, and a liquid crystal layer 520, wherein the liquidcrystal layer 520 is sandwiched between the color filter substrate 400and the active device array substrate 510.

In an embodiment, the LCD panel 500 includes a sealant 530 disposedbetween the color filter substrate 400 and the active device arraysubstrate 510 and surrounding the light shading structure 200 b.Particularly, the light shading structure 200 b has at least one channel222, shown in FIGS. 2A-2C, and FIG. 3.

In the process for forming the LCD panel 500, the color filter substrate400 will be disposed with the sealant 530, and injected with liquidcrystals to form the liquid crystal layer 520, and combined with theactive device array substrate 510, such that the LCD panel 500 isobtained. After injecting liquid crystals onto the color filtersubstrate 400, the liquid crystals will gradually diffuse and part ofthe liquid crystals will flow towards the direction of the arrow asshown in FIG. 6. It should be noted that since the light shadingstructure 200 b has a plurality of channels 222, shown in FIGS. 2A-2C,and FIG. 3, when the liquid crystals flow to the light shading structure200 b, they will be guided into the channels 222, such that it will takea longer time for the liquid crystals to flow to the sealant 530.

Moreover, since the light shading structure 200 b is a multi-layer film,the flowing of the liquid crystals will be hindered through utilizingthe slope of the light shading structure 200 b, thereby prolonging thetime taken by the liquid crystals to flow to the sealant 530. In thismanner, by the time the liquid crystals are in contact with the sealant530, the sealant 530 has already solidified. Therefore, thecontamination caused by the contact of the liquid crystals and theun-solidified sealant 530 can be avoided. And the LCD panel 500 with thelight shading structure 200 b can be used to reduce the light leakage atthe edge of the display region 300 a.

Similarly, the above light shading structure 200 b also can be used tomanufacture the active device array substrate in the form of COA. FIG. 7is a schematic cross-sectional view of an active device array substrateaccording to an embodiment of the invention. Referring to FIG. 7, anactive device array substrate 600 includes a substrate 300, a pluralityof scan lines 612, a plurality of data lines 614, a plurality of activedevices 616, a plurality of pixel electrodes 618, the above lightshading structure 200 b, and a plurality of color filter units 410. Thesubstrate 300 is the same as the one described above. The scan lines 612and the data lines 614 are disposed in the display region 300 a. Theactive devices 616 are disposed in the display region 300 a on thesubstrate 300, wherein each active device 616 is electrically connectedwith the scan lines 612 and the data lines 614. The pixel electrodes 618are disposed in the display region 300 a on the substrate 300, whereineach pixel electrode 618 is respectively electrically connected with theactive devices 616. The light shading structure 200 b, with the sameconstruction as that described above, is disposed above the substrate300. The color filter units 410 are correspondingly disposed in theplurality of sub-pixel regions 210 a defined by the black matrix 210 inthe display region 300 a.

In view of the above, the materials of the substrate 300, the lightshading layer 220 b, and the color filter units 410 are the same as thatdescribed above. The materials of the scan lines 612 and the data lines614 can be one of Al, Cr, Al alloy, Cr alloy, and combinations thereofor another suitable electrical conducting material. The active devices616 are, for example, thin film transistors or other switching elementswith three terminals. The material of the pixel electrodes 618 can beone of ITO, IZO, metal, and combinations thereof or another suitablematerial. The material of the black matrix layer 210 is, for example,resin or another suitable material.

It should be noted that the color filter units 410 and the light shadingstructure 200 b are disposed on the active device array substrate 600,i.e., the active device array substrate 600 employs the structure ofcolor filter on array (COA). Therefore, the active device arraysubstrate 600 itself has the filtering function. Moreover, referring toFIG. 7, the active device array substrate 600 is provided with a flatlayer 620, so that the above color filter units 410 and the lightshading structure 200 b can be disposed on the flat layer 620.

Moreover, in an embodiment, the light shading structure 200 b of theactive device array substrate 600 can include at least one channel 222disposed in the light shading layer 220 b. The pattern of the channel222 may be the one shown in FIGS. 2A-2C, and FIG. 3, but other patternsalso can be used as desired. Similarly, through the active device arraysubstrate 600 shown in FIG. 7, the LCD panel 700 that will be describedbelow can be manufactured.

FIG. 8 is a schematic cross-sectional view of an LCD panel according toanother embodiment of the invention. Referring to FIG. 8, the LCD panel700 includes the active device array substrate 600, an oppositesubstrate 710, and a liquid crystal layer 520, wherein the liquidcrystal layer 520 is sandwiched between the active device arraysubstrate 600 and the opposite substrate 710.

In an embodiment, the LCD panel 700 includes a sealant 530 disposedbetween the active device array substrate 600 and the opposite substrate710, and surrounding the light shading structure 200 b. Particularly,the light shading structure 200 b has at least one channel 222, shown inFIGS. 2A-2C, and FIG. 3. Moreover, the opposite substrate 710 includes asubstrate 712 and a common electrode 714 disposed on the substrate 712.

In the above process for forming the LCD panel 700, the active devicearray substrate 600 will be disposed with the sealant 530, and injectedwith liquid crystals to form the liquid crystal layer 520, and combinedwith the opposite substrate 710, etc, such that the LCD panel 700 isobtained. As described in the above LCD panel 500, the light shadingstructure 200 b can be used to ease the light leakage at the edge of thedisplay region 300 a, and to slow down the flow speed of the liquidcrystals, so that the contamination caused by the contact of the liquidcrystal and the un-solidified sealant 530 can be avoided.

In summary, the light shading structure, the color filter substrate, theactive device array substrate, and the LCD panel provided by theinvention have at least the following advantages:

(1) A light shading layer is disposed on the black matrix layer of thenon-display region adjacent to the edge of the display region, thus thelight shading effect of the black matrix of the non-display region canbe enhanced. That is, the phenomenon of light leakage will not easilyoccur at the edge of the LCD panel manufactured by using a color filtersubstrate or an active device array substrate with the light shadingstructure.

(2) The light shading structure has a multi-layer film and a pluralityof channels. When an LCD panel is manufactured by using a color filtersubstrate or an active device array substrate with the light shadingstructure, the liquid crystals will be guided into the channel, and theflowing of liquid crystal will be hindered by the light shadingstructure, so the time taken by the liquid crystal to diffuse to thesealant will be prolonged. Therefore, there is sufficient time for thesealant to become solidified, so that liquid crystals will not be incontact with the un-solidified sealant, and the liquid crystals areprevented from being contaminated.

(3) Additional processes and masks are not required for manufacturingthe light shading structure, the color filter substrate, the activedevice array substrate, and the LCD panel provided by the invention, sothe manufacturing cost will not be increased.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of theinvention without departing from the scope or spirit of the invention.In view of the foregoing, it is intended that the invention covermodifications and variations of this invention provided they fall withinthe scope of the following claims and their equivalents.

1. A color filter substrate, comprising: a substrate, having a displayregion and a non-display region; a light shading structure, disposed onthe substrate, and comprising: a black matrix layer, disposed on thesubstrate, and used for defining a plurality of sub-pixel regions in thedisplay region and covering the non-display region adjacent to the edgeof the display region; a light shading layer, disposed on the blackmatrix layer of the non-display region adjacent to the edge of thedisplay region; and a plurality of color filter units, correspondinglydisposed in the sub-pixel regions.
 2. The color filter substrate asclaimed in claim 1, wherein the light shading layer has at least onechannel.
 3. The color filter substrate as claimed in claim 1, whereinthe material of the light shading layer is selected from the groupconsisting of red photoresist, green photoresist, blue photoresist and acombination thereof.
 4. The color filter substrate as claimed in claim1, wherein the material of the black matrix layer includes resin.
 5. Thecolor filter substrate as claimed in claim 1, wherein the light shadinglayer comprises: a first light shading layer; a second light shadinglayer, disposed on the first light shading layer; and a third lightshading layer, disposed on the second light shading layer.
 6. The colorfilter substrate as claimed in claim 1, further comprising a commonelectrode disposed on parts of the light shading structure and the colorfilter units.
 7. An active device array substrate, comprising: asubstrate, having a display region and a non-display region; a pluralityof scan lines and data lines, disposed in the display region; aplurality of active devices, disposed in the display region on thesubstrate, wherein each active device is electrically connected with oneof the scan lines and one of the data lines; a plurality of pixelelectrodes, disposed in the display region on the substrate, whereineach pixel electrode is respectively electrically connected with one ofthe active devices; a light shading structure, disposed on thesubstrate, and comprising: a black matrix layer, disposed on thesubstrate, and used for defining a plurality of sub-pixel regions in thedisplay region and covering the non-display region adjacent to the edgeof the display region; a light shading layer, disposed on the blackmatrix layer of the non-display region adjacent to the edge of thedisplay region; and a plurality of color filter units, correspondinglydisposed in the sub-pixel regions.
 8. The active device array substrateas claimed in claim 7, wherein the light shading layer has at least onechannel.
 9. The active device array substrate as claimed in claim 7,wherein the material of the light shading layer is selected from thegroup consisting of red photoresist, green photoresist, blue photoresistand a combination thereof.
 10. The active device array substrate asclaimed in claim 7, wherein the material of the black matrix layerincludes resin.
 11. The active device array substrate as claimed inclaim 7, wherein the light shading layer comprises: a first lightshading layer; a second light shading layer, disposed on the first lightshading layer; and a third light shading layer, disposed on the secondlight shading layer.
 12. A liquid crystal display (LCD) panel,comprising: a color filter substrate as claimed in claim 1; an activedevice array substrate; and a liquid crystal layer, sandwiched betweenthe color filter substrate and the active device array substrate. 13.The LCD panel as claimed in claim 12, further comprising a sealant,located between the color filter substrate and the active device arraysubstrate and surrounding the light shading structure.
 14. The LCD panelas claimed in claim 13, wherein the light shading layer has at least onechannel.
 15. A liquid crystal display (LCD) panel, comprising: an activedevice array substrate as claimed in claim 7; an opposite substrate; anda liquid crystal layer, sandwiched between the active device arraysubstrate and the opposite substrate.
 16. The LCD panel as claimed inclaim 15, further comprising a sealant, located between the activedevice array substrate and the opposite substrate and surrounding thelight shading structure.
 17. The LCD panel as claimed in claim 16,wherein the light shading layer has at least one channel.